3 Fitness Assumptions Gen-X Women Make (And Why They’re Wrong) : If you are a women born between 1965 and 1980, you’re considered part of Generation X, the post Boomer generation that saw the technological revolution come about in the late 20th century. While Millennials have surpassed the Baby Boomer generation in scale, the Pew Research Center believes that by 2028, Gen X will outnumber the Baby Boomer generation as well.